GNU Octave - Programming language

GNU Octave is an open source programming language created in 1988 by John W. Eaton.

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GNU Octave is software featuring a high-level programming language, primarily intended for numerical computations. Octave helps in solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with Matlab. It may also be used as a batch-oriented language. Read more on Wikipedia...

Tags: programming language
Early development of GNU Octave happened in University of Wisconsin-Madison and University of Texas
There are 150 Project Euler users using GNU Octave
Explore GNU Octave snippets on Rosetta Code
GNU Octave on HOPL
GNU Octave appears in the TIOBE Index
GNU Octave Ubuntu package
CodeMirror package for syntax highlighting GNU Octave
Pygments supports syntax highlighting for GNU Octave
GNU Octave appears in the Quine Relay project
There is 1 Jupyter Kernel for GNU Octave
See also: (10 related languages) Linux, C, Fortran, Scilab, OpenGL, Gnuplot, Unix, Bash, Lisp, Qt

Example from Riju:

disp("Hello, world!")

Example from hello-world:

printf("Hello World");

Example from the Hello World Collection:

#Hello World in Octave (http://www.octave.org/)
printf("Hello World\n");

Example from Wikipedia:

% create figure and panel on it
f = figure;
% create a button group
gp = uibuttongroup (f, "Position", [ 0 0.5 1 1])
% create a buttons in the group
b1 = uicontrol (gp, "style", "radiobutton", "string", "Choice 1", "Position", [ 10 150 100 50 ]);
b2 = uicontrol (gp, "style", "radiobutton", "string", "Choice 2", "Position", [ 10 50 100 30 ]);
% create a button not in the group
b3 = uicontrol (f, "style", "radiobutton","string", "Not in the group","Position", [ 10 50 100 50 ]);

Language features

Feature	Supported	Example	Token
MultiLine Comments	✓
Integers	✓	% \d+
Floats	✓	% (\d+\.\d\|\d\.\d+)([eEf][+-]?[0-9]+)?
Strings	✓	"Hello world"	"
Print() Debugging	✓		printf
Line Comments	✓	% A comment	%
Comments	✓
Semantic Indentation	X